Improvement in gage-cocks



B. E. LEHMAN 8L ROBERT RGSS.

` Improvement' in Gauge-Cocks.

NO. H5574@ 'I n PatentedJl-xne 6,1871.

UNITED STATES BERNHARD E. LEHMAN AND ROBERT ROSS, OF BETHLEHEM, PA.

IMPROVEMENT IN eAescocKs.

Specification forming part of Letters Patent No. 115,746, dated June 6, 1871.

Nature cmd Object of lthe Intent-ion.

Our invention consists in certain improvements in gage-cocks, too fully described hereafter to need preliminary explanation, whereby the expense of manufacturing and repairing the cocks is reduced and the adjustment of the parts is more readily effected than in those of the usual construction.

Descriptionof the Accompanying Drawing.

Figure 1 is a longitudinal section of our improved gage-cock; Fig. 2, an end view of part of the cock; and Fig. 3, an end view of another part of the cock.

General Description.

The tubular stem A screws into the head of the boiler, as usual, and has at its front end a projection, G, the face of which is flattened to form a seat for a packing, D, which closes the mouth of the central steam orifice a in the stem. The packing D fits and is adjustable in a socket in a lever, consisting of a block, E, and a threaded stem, G, having a weight at its outer .endand screwing into the block, and bearing with its inner end against the ad jacent end of the packing D. A flat projection, J on the block E, extends between hooked lugs F F on the stem A, and has, at the opposite sides, pins d d, which bear against the inner edges `*of the lugs, as shown in the drawing. As the packing wears away it is forced out of the socket byturning the stem U of the lever,

the latter affording a ready means of effecting this result in place of the set-screws (and other devices requiring specialinstruments to adjust them) commonly used.

By placing the lever directly on a line with the steam-passage in the stem and with its fulcrum above the passage, as described, the desired pressure can be obtained without employing an excessive mass of material as a weight to maintain the packing against its seat, while the simple arrangement of lugs and pins described permits the lever to be quickly and entirely removed, to replace the packing or clear the opening a of obstructions. By this arrangement, also, the necessity of employing springs, which are expensive, unreliable in their action, :and which prevent free access to the packing and opening, is avoided.

It will be seen that the different parts of the' cock may be cast separately, and connected together without any further fitting than is necessary to insert the packing and form the screw-threads, the expensive iitting and nice adjustment required in cocks of this class constructed in the ordinary manner being avoided.

Claims.

B. E. LEHMAN. ROBERT Ross. j

Witnesses:

W. M. WENDELL, FRANK HAMMAM.

PATENT @Trion- 

